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(No Model.) 2 Sheets-Sheet 1.

J. N. WEAVER.

- SPARK ARRESTER.

No. 303,249 Patented Aug. 5,1884.

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, ATTORNEYS.

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(No Model.) 2 Sheets-Sheet 2.

J. N. WEAVER.

SPARK ARRESTER. No. 303.249. Patented Aug. 5, 1884.

WITNESSES: INVENTOR: Jag BY ATTORNEYS.

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' JAMES N. WEAVER, OF SAYRE, PENNSYLVANIA.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 303,249, dated August 5, 1884.

Application filed April 3, 1884.

To all whom 216 may concern.-

Be it known that I, JAMES N. Wnxvnn, of Sayre, in the county of Bradford and State of Pc1insylvania,'have invented certain new and useful improvements in Spark-Arresters, of which the following is a full, clear, and exact description.

lhis invention more particularly relates to sparkarrcsters for hard and soft coal burning locomotives, similar in certain respects to the means described in my Reissued Letters Patout No. 7,717, dated May 29, 1877, but more advantageous as regards arresting the sparks and promoting draft without increasing backpres'sure on the pistons of the engine.

The improvements include, certain means, whereby c'inders or dirt are effectually prevented from being drawn int-o the valves and cylinders of the engine, an even draft on the fire is secured, a wire-drawing effect produced on the draft where the steam-nozzle is connected with the smoke-stack, and an increased length of smokestack within a given space is obtained, and a better draft produced on the fire, substantially as hereinafter described.

Reference is to be had to the accompanying drawings, forming partof this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 represents a front view of a locomotive in part with-the smolrebox cover removed and having my invention applied. Fi 2 is a mainly cent-rally sectional vertical view of the same in a plane at right angles to Fig. 1; and Fig. 3, a top or plan view of the exhaustnozzle with its pipes, branches, or connections to the cylinders of the engine.

A indicates the truck-frame of a locomotiveengine,B B its wheels, and O the axles thereof.

1) D are the cylinders of the engine, and E the saddle carrying the same and supporting a cylindrical smoke-box, F.

G is the steam-exhaust nozzle, which may communicate with the cylinders of the engine in the usual manner. Said nozzle, as in my former patent hereinbefore referred to, opens at its upper end into a wire-netting tube, H, of an inverted conical shape, but which, instead of being attached at its larger and upper extremity to the inside of the upper part of the smoke-box, is attached to the lower end of (No model.)

thesmokc-st-ack L, that is extended far down into the smoke-box, as at Z. This extension of the Smokestack permits of the use of a nozzle of snfiicient height or length togive a per fectlyeven draft on the fire, the length of said nozzle being determined by the length of the 7 fire-box.

The portion of the netting H between the lower extension, Z, of the smoke-stack and the nozzle G is of such area or capacity as to have' a wiredrawing eifcct on the draft, the proportion of said area being determined by the length of the extension lot the smoke-stack within thesnioke-boX. By wire drawing effect on the draft I mean that more air is displaced in the stack'at every exhaust of the engine than can be taken in through the netting in the time required for each exhaust, which. causes each exhaust to have a prolonging effect on the fire, whereby the exhaust-openings may be made larger than usual, and consequently less back-pressure be thrown upon the pistons of the engine. Likewise, by the downward extension of the smokestack, as described, a longer stack for a given height or space is obtained, thereby adding to the draft on the fire.

J is the sparkreceiver; or there may be more than one. Said receiver, which is of close construction, and is arranged below the smoke box, may be carried by the saddle E, and has a butterfly or other suitable valve, M, in its bottom.

Opening into the top or over the upper end portion of the steain-nozzle G is a small steam-conducting pipe or jettube, g, which, passing downward, faces, at its lower end a flaring or bell-shaped mouth, h, of a sparkconducting pipe, I, which communicates with the upper portion of the sparlnreceiver 3. At every exhaust of the engine a portion of the exhaust-steam is made to pass through the pipe 9, and the sparks that are drawn into the smoke-box F, and which drop by gravity, will be blown by the steam issuing from the lower end of the pipe 9 into and through the sparkconducting pipe I, and from thence into the.

receiver J. At the same time the main body of the oxhauststeain, passing the upper end of a pipe, K, which projects upwardly within the stack and connects below with the sparln receiver, creates a suction through the pipe K, which assists in drawing the sparks out of the smoke-box F, and also carries off the steam which is blown out with the sparks by the pipe 9. A wire screen, is, arranged at the connection of the pipe K with the spark-receiver J, prevents any sparks from being drawn out through said pipe K, and causes the sparks and cinders blown into the receiver J to remain there until dumped out through the valve M.

By the arrangement, as described, of the exhaust-steam-conducting pipe 9 over or as compared with side exit tubes in the base of the nozzle'G, as shown and. described in my Letters Patent hereinbefore referred to, the liability of particles of einders and'dirt which lie on the bottom of the smoke-arch being drawn into the valves and cylinders of the engine, to the great detriment of the same, is entirely obviated. This is to be accounted for by the fact that when steam is shut ofi from the engine, or when the engine is being reversed, there is naturally a strong downward current or suction through the exhaust-nozzle, and a still stronger suction is established through the blow or exit tubes when connecting with the exhaust-nozzle at or near its base, whereas by the exposure of the connecting end of the 0011- dueting-tube over the upper end of the exhaust-nozzle, suction=through it is so far reduced or avoided as to entirely do away with the passage of cinders or dirt through it, while the other end of said tube occupies the necessary depressed position relatively to the bottom of the smoke-box.

Upon the shaft of the butterfly-valve M in the bottom of the spark-receiver J is a crank,

The invention is not necessarily restricted to 1ocomotive-engines, and there may be any number of steam-conducting pipes or jet-tubes g, or suction-pipes K and spark-receivers J, with their necessary attachments or connec tions.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The smoke-stack L, arranged to extend down into the smoke-box, in combination with the inverted conical or downwardly-tapering wire-netting or perforated tube H, connected 'at its larger and upper end to the lower extension, Z, of the smoke-stack within the smoke-box, and the exhaust-steam nozzle G, arranged to enter up Within and through the smaller end of said wire-netting or perforated tube, substantially as specified.

2. The combination, with the exhaust-steam nozzle, the smoke-box, and one or more sparkreceivers arranged below said box and in open communication therewith near its base, of one or more steam-conducting pipes or jettubes arranged to connect at their one end with or over the upper end of the exhaust-nozzle, and, dipping downward, to face at their lower end the inlet opening or openings to the spark receiver or receivers, essentially as described.

' JAMES N. WEAVER.

Witnesses:

R. H. VVINLAOK, YVM. B. HECKMAN. 

